Ninja

Well, i always wanted to make a ninja, but most of the time i didnt got it right. lack of reference, and research.so, i found the right stuff (at least i think i did) And i made this, sketched it on a4 paper. scanned. and you guys know the restbut the thing is, is that looking at my works, and other people's works, i tend to find all my drawings look kind of unfinished. But thats not because i don't spend time on them, its because i'm always uncertain of it looking too glossy, or not being able to generate an atmosphere.So, i was wandering if you guys could give me some advice, tips or whatever, to help me.Because , from where i'm standing. i need some serious evolving!Thanks alot!